1 /* See LICENSE file for license details. */
2 #define _XOPEN_SOURCE 500
15 #include <sys/types.h>
16 #include <X11/extensions/Xrandr.h>
17 #include <X11/keysym.h>
19 #include <X11/Xutil.h>
22 #include <login_cap.h>
39 unsigned long colors[NUMCOLS];
44 static Bool running = True;
45 static Bool failure = False;
51 die(const char *errstr, ...)
56 vfprintf(stderr, errstr, ap);
69 fd = open("/proc/self/oom_score_adj", O_WRONLY);
70 if (fd < 0 && errno == ENOENT)
72 if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
73 die("cannot disable the out-of-memory killer for this process\n");
78 /* only run as root */
86 pw = getpwuid(getuid());
89 die("slock: getpwuid: %s\n", strerror(errno));
91 die("slock: cannot retrieve password entry\n");
96 if (rval[0] == 'x' && rval[1] == '\0') {
98 sp = getspnam(getenv("USER"));
100 die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
105 /* drop privileges */
106 if (geteuid() == 0 &&
107 ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
108 die("slock: cannot drop privileges\n");
117 readpw(Display *dpy, const char *pws)
120 char buf[32], passwd[256];
122 unsigned int len, llen;
129 /* As "slock" stands for "Simple X display locker", the DPMS settings
130 * had been removed and you can set it with "xset" or some other
131 * utility. This way the user can easily set a customized DPMS
133 while (running && !XNextEvent(dpy, &ev)) {
134 if (ev.type == KeyPress) {
136 num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
137 if (IsKeypadKey(ksym)) {
138 if (ksym == XK_KP_Enter)
140 else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
141 ksym = (ksym - XK_KP_0) + XK_0;
143 if (IsFunctionKey(ksym) ||
145 IsMiscFunctionKey(ksym) ||
147 IsPrivateKeypadKey(ksym))
153 running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
155 running = !!strcmp(crypt(passwd, pws), pws);
171 if (num && !iscntrl((int) buf[0]) && (len + num < sizeof(passwd))) {
172 memcpy(passwd + len, buf, num);
177 if (llen == 0 && len != 0) {
178 for (screen = 0; screen < nscreens; screen++) {
179 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
180 XClearWindow(dpy, locks[screen]->win);
182 } else if (llen != 0 && len == 0) {
183 for (screen = 0; screen < nscreens; screen++) {
184 XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[failure || failonclear ? FAILED : INIT]);
185 XClearWindow(dpy, locks[screen]->win);
189 } else if (rr && ev.type == rrevbase + RRScreenChangeNotify) {
190 XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
191 for (screen = 0; screen < nscreens; screen++) {
192 if (locks[screen]->win == rre->window) {
193 XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height);
194 XClearWindow(dpy, locks[screen]->win);
197 } else for (screen = 0; screen < nscreens; screen++)
198 XRaiseWindow(dpy, locks[screen]->win);
203 unlockscreen(Display *dpy, Lock *lock)
205 if(dpy == NULL || lock == NULL)
208 XUngrabPointer(dpy, CurrentTime);
209 XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
210 XFreePixmap(dpy, lock->pmap);
211 XDestroyWindow(dpy, lock->win);
217 lockscreen(Display *dpy, int screen)
219 char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
224 XSetWindowAttributes wa;
227 if (dpy == NULL || screen < 0)
230 lock = malloc(sizeof(Lock));
234 lock->screen = screen;
236 lock->root = RootWindow(dpy, lock->screen);
238 for (i = 0; i < NUMCOLS; i++) {
239 XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
240 lock->colors[i] = color.pixel;
244 wa.override_redirect = 1;
245 wa.background_pixel = lock->colors[INIT];
246 lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
247 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
248 DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
249 lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
250 invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
251 XDefineCursor(dpy, lock->win, invisible);
252 XMapRaised(dpy, lock->win);
254 XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
255 for (len = 1000; len; len--) {
256 if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
257 GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
261 if (running && (len > 0)) {
262 for (len = 1000; len; len--) {
263 if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
269 running &= (len > 0);
271 unlockscreen(dpy, lock);
275 XSelectInput(dpy, lock->root, SubstructureNotifyMask);
284 fprintf(stderr, "usage: slock [-v]\n");
289 main(int argc, char **argv) {
290 #ifndef HAVE_BSD_AUTH
296 if ((argc == 2) && !strcmp("-v", argv[1]))
297 die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
305 if (!getpwuid(getuid()))
306 die("slock: no passwd entry for you\n");
308 #ifndef HAVE_BSD_AUTH
312 if (!(dpy = XOpenDisplay(0)))
313 die("slock: cannot open display\n");
314 rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
315 /* Get the number of screens in display "dpy" and blank them all. */
316 nscreens = ScreenCount(dpy);
317 locks = malloc(sizeof(Lock *) * nscreens);
319 die("slock: malloc: %s\n", strerror(errno));
321 for (screen = 0; screen < nscreens; screen++) {
322 if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
327 /* Did we actually manage to lock something? */
328 if (nlocks == 0) { /* nothing to protect */
334 /* Everything is now blank. Now wait for the correct password. */
341 /* Password ok, unlock everything and quit. */
342 for (screen = 0; screen < nscreens; screen++)
343 unlockscreen(dpy, locks[screen]);